Brush



sept. 11, 1928. 1,683,618-

A. L. HOFFMAN v BRUSH Filed Sept. 2, 1925 7% M, MJM y Patented Sept. 11, 1928.

\ UNITED STATES ARTHUR L. HOFFMAN, F PITTSBURGH, PENNSYLVANIA.

BRUSH.

Apbiieafion ined september 2, 1925. serial No. 54,040. i

break, they will still be retained lin place;`

The invention has for a.y further object to provide simple and eiiicieiit method of assembling brushes.

The invention may readily be understood by reference to the accompanying drawings,

which are illustrative of the spirit oi my` invention and in which:

Figure 1 is a somewhat diagrammatic view, showing the first step inzthe method oi assembling brushes, the hub of ythe brush being shown in section;

Figure 2 is a similar view, showing the next succeeding step; Figure 3 is a section on the line III#III of Figure 2;

Figure 4 is a transverse section through the completed brush; and

Figure 5 is a side elevation of the completed brush. l

In Vthe drawings, 5 designates Ya suitable hub member having a central opening 6 and a coiicaved periphery '7.` In the manufacture of the brush the bristles, which may be of wire or fiber, or any other suitable material, and designated as 8, are laid around the periphery of the brush, as shown in Figure 1.

One or more binders are then passed around `the hub over the bristles and the ends of these binders are twisted together to clamp thebristles to thehub. I have shown two such binders,- one of which is designated 9 and the other of which is designated 10. Binder 9 has its ends twisted together at 9a and the ends of the binder 10 are connected at 10a. The tightening of the binders 9 and 10 tends to bend the bristles into the U shape shown in Figure 2.

Side bands or hoops 11 are then applied to each side ofthe brush and transverse binders 12 are passed through the bristles and secured to the side bands at opposite sides of the brush. The binders 12 are arranged at desired intervals around the wheel vand are preferably provided with hooks 13 by means of which they are connected with the bands l1. rlhe transverse bindersA 12 are preferably passed, through the bristles in such manner that' they extend across the-binders 9 and l0 in contact'therewith. i l

In the completed brush thebinders 9 and 10 serveto secure the bristles .to the hub.- The hoops Yl1 lserve vto prevent the-bristles from 'spreadingg The binders .12, `in addition to holding the hoopsll in proper position lon the brush, also serve to prevent the bristles contact with the wires 9 and 10,`"tliey serve topi-event these wires from coming off should the wires break or become discon-Q nected when the brush is in use.

'from bunching or creeping around the 4periphery of the hoop. Since they are in It is preferred that the connection 9a in bled, the bristles may be trimmed up if necessary. y

There is little danger ina brush thus constructed of any lof the bindin ywires tearing loose, and the brush is accordingly 'safe for use at high speeds. The bristles are irinly and tightlyy secured in place and itis not possible for them to become hunched.' The' brush is confined against spreading by the hoops Vl1 at each side thereof. The method is one which may be easily practiced and requires no special skill or equipment. p

A brush'constructed in accordance with the present invention preferably has a woodenV or other readily brealable hub.

vSuch a construction ada ts itself readily to an arrangement wherein a plurality of brush sections are arranged side by side on an arbor to form a brush of considerable width. Then, if one or more sections wear down, break or develop imperfections which render Vit useless, that particular section or sections may be broken out and the remaining brush sections on the arbor moved together. This is of particular advantage in mills for brushing tin plates and the like. Various changes and modifications may be made in the details of construction Vand in the method of assembly within the spirit of myinvention and under the scope o1 the appended claims.

kbristles arranged about the hub member, a. binder for securing the bristles lto the hub member, hoops at the sides of the aforesaid structure, and transverse vbinders connecting the hoops and in contact with the first binder.

3. A brush including a hub member having a concaved periphery, a plurality of yWire binders passed around the hub member over the bristles for securing the bristles to the hub member, each of said wire binders having its ends twisted together, a side hoop at each side of the bristles, and transverse binders connecting the side hoops, one of said transverse binders being in Contact with one of the twisted ends of the first mentioned binders.

4. A brush comprising a hub member having its central portion depressed relatively to the side portion, bristles arranged about the hub member. and transversely thereof, a eireumferentially extending binder around the hub member over the bristles for seenring the bristles in place and causing the bristles to substantially conform to the contour of the hub, hoops at the sides ofthe aforesaid structure, eircumferentially of the hub` and transverse binders connecting the hub.

In testimony whereof I have hereunto set my hand. l

ARTHUR L. HOFFMAN.

CERTlFlCATE OF CORREGTIOli.v

lPatent No. 1,683,618. Granted September 11, 1928, to

ARTHUR L. HOFFMAN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page l, line 80, for the word "is" read v"in"; page 2, line 6, claim 1, after the word "structure" insert the words "circumferentially of the hub" and ,line 8, for the word "connecting" read "nterconnecting"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record o f the case in the Patent Office.

Signed and sealed this 20th day of November, A. D, 1928.

M. J. Moore,

(Seal) Acting Commissioner of Patentsg 

